<template>
  <div>
    <el-row class="do-exam-title">
      <el-col :span="24">
        <span :key="item.itemOrder" v-for="item in answer.answerItems">
          <el-tag
            :type="questionCompleted(item.completed)"
            class="do-exam-title-tag"
            @click="goAnchor('#question-' + item.itemOrder)"
          >{{ item.itemOrder }}</el-tag
          >
        </span>
        <span class="do-exam-time">
          <label>剩余时间：</label>
          <label>{{ formatSeconds(remainTime) }}</label>
        </span>
      </el-col>
    </el-row>
    <el-row class="do-exam-title-hidden">
      <el-col :span="24">
        <span :key="item.itemOrder" v-for="item in answer.answerItems">
          <el-tag class="do-exam-title-tag">{{ item.itemOrder }}</el-tag>
        </span>
        <span class="do-exam-time">
          <label>剩余时间：</label>
        </span>
      </el-col>
    </el-row>
    <el-container class="app-item-contain">
      <el-header class="align-center">
        <h1>{{ form.name }}</h1>
        <div>
          <span class="question-title-padding">试卷总分：{{ form.score }}</span>
          <span class="question-title-padding"
          >考试时间：{{ form.suggestTime }}分钟</span
          >
        </div>
      </el-header>
      <el-main>
        <el-form
          :model="form"
          ref="form"
          v-loading="formLoading"
          label-width="100px"
        >
          <el-row :key="index" v-for="(titleItem, index) in form.titleItems">
            <h3>{{ titleItem.name }}</h3>
            <el-card
              class="exampaper-item-box"
              v-if="titleItem.questionItems.length !== 0"
            >
              <el-form-item
                :key="questionItem.itemOrder"
                :label="questionItem.itemOrder + '.'"
                v-for="questionItem in titleItem.questionItems"
                class="exam-question-item"
                label-width="50px"
                :id="'question-' + questionItem.itemOrder"
              >
                <QuestionEdit
                  :qType="questionItem.questionType"
                  :question="questionItem"
                  :answer="answer.answerItems[questionItem.itemOrder - 1]"
                />
              </el-form-item>
            </el-card>
          </el-row>
          <el-row class="do-align-center">
            <el-button type="primary" @click="submitForm">提交</el-button>
            <el-button>取消</el-button>
          </el-row>
        </el-form>
      </el-main>
    </el-container>
  </div>
</template>

<script>
import { mapState, mapGetters } from 'vuex'
import { formatSeconds } from '@/utils'
import QuestionEdit from '../components/QuestionEdit'
import examPaperApi from '@/api/examPaper'
import examPaperAnswerApi from '@/api/examPaperAnswer'

export default {
  components: { QuestionEdit },
  data () {
    return {
      form: {},
      formLoading: false,
      answer: {
        questionId: null,
        doTime: 0,
        answerItems: [],
      },
      timer: null,
      remainTime: 0,
    }
  },
  created () {
    let id = this.$route.query.id
    let _this = this
    if (id && parseInt(id) !== 0) {
      _this.formLoading = true
      examPaperApi.select(id).then((re) => {
        _this.form = re.response
        _this.remainTime = re.response.suggestTime * 60
        _this.initAnswer()
        _this.timeReduce()
        _this.formLoading = false
      })
    }
  },
  mounted () {
  },
  beforeDestroy () {
    window.clearInterval(this.timer)
  },
  methods: {
    formatSeconds (theTime) {
      return formatSeconds(theTime)
    },
    timeReduce () {
      let _this = this
      this.timer = setInterval(function () {
        if (_this.remainTime <= 0) {
          _this.submitForm()
        } else {
          ++_this.answer.doTime
          --_this.remainTime
        }
      }, 1000)
    },
    questionCompleted (completed) {
      return this.enumFormat(this.doCompletedTag, completed)
    },
    goAnchor (selector) {
      this.$el
        .querySelector(selector)
        .scrollIntoView({
          behavior: 'instant',
          block: 'center',
          inline: 'nearest',
        })
    },
    initAnswer () {
      this.answer.id = this.form.id
      let titleItemArray = this.form.titleItems
      for (let tIndex in titleItemArray) {
        let questionArray = titleItemArray[tIndex].questionItems
        for (let qIndex in questionArray) {
          let question = questionArray[qIndex]
          this.answer.answerItems.push({
            questionId: question.id,
            content: null,
            contentArray: [],
            completed: false,
            itemOrder: question.itemOrder,
          })
        }
      }
    },
    submitForm () {
      let _this = this
      window.clearInterval(_this.timer)
      _this.formLoading = true
      examPaperAnswerApi
        .answerSubmit(this.answer)
        .then((re) => {
          if (re.code === 1) {
            _this.$alert('试卷得分：' + re.response + '分', '考试结果', {
              confirmButtonText: '返回考试记录',
              callback: (action) => {
                _this.$router.push('/record/index')
              },
            })
          } else {
            _this.$message.error(re.message)
          }
          _this.formLoading = false
        })
        .catch((e) => {
          _this.formLoading = false
        })
    },
  },
  computed: {
    ...mapGetters('enumItem', ['enumFormat']),
    ...mapState('enumItem', {
      doCompletedTag: (state) => state.exam.question.answer.doCompletedTag,
    }),
  },
}
</script>

<style lang="scss" scoped>
.align-center {
  text-align: center;
}

.exam-question-item {
  padding: 10px;

  .el-form-item__label {
    font-size: 15px !important;
  }
}

.question-title-padding {
  padding-left: 25px;
  padding-right: 25px;
}
</style>
